a-a a-b a-z aaa aab aae aam aas aaz ab- aba abb abe abm abs abz aea aeb aee aem aes aez ama amb ame amm ams amz as- asa asb ase asm ass asz az- aza azb aze azm azs azz baa bab bae bam bas baz bba bbb bbe bbm bbs be- bea beb bee bem bes bez bma bmb bme bmm bms bmz bsa bsb bse bsm bss bza bze bzs bzz eaa eab eae eam eas eaz eba ebb ebe ebm ebs eea eeb eee eem ees em- ema emb eme emm ems es- esa esb ese esm ess eze ezs ezz maa mab mae mam mas maz mba mbb mbe mbm mbs mea meb mee mem mes mez mma mmb mme mmm mms mmz msa msb mse msm mss mza mzb mzm saa sab sae sam sas saz sba sbb sbe sbm sbs se- sea seb see sem ses sez sma smb sme smm sms smz ss- ssa ssb sse ssm sss ssz sza sze zaa zab zam zas zaz zbb zbm zbs zea zeb zee zem zes zez zma zmb zmm zms zsa zse zsm zsz zzs zzz